STUDY ON THERMAL AND HYDRAULIC PERFORMANCE OF THIRD GENERATION SOLAR THERMAL POWER HEAT EXCHANGER

Wang Yanquan; Lu Yuanwei; Gao Qi; Li Feng; Ma Yancheng; Wu Yuting

doi:10.19912/j.0254-0096.tynxb.2023-1156

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (12) : 190-196. DOI: 10.19912/j.0254-0096.tynxb.2023-1156

STUDY ON THERMAL AND HYDRAULIC PERFORMANCE OF THIRD GENERATION SOLAR THERMAL POWER HEAT EXCHANGER

Wang Yanquan, Lu Yuanwei, Gao Qi, Li Feng, Ma Yancheng, Wu Yuting

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Abstract

This article uses numerical simulation methods to investigate the thermal hydraulic laws of the flow channels in a molten salt and sCO₂ printed circuit board heat exchanger （PCHE） using binary eutectic salts MgCl₂-KCl and sCO₂ as heat transfer media. In the airfoil channel, due to the collision of the flowing working fluid at the end of the fins, the minimum flow velocity generally occurs at the end of the fins. Due to the influence of flow velocity, the minimum pressure usually occurs at the thickest part of the fins. Nu and Δp in both straight and wing channels increase with the increase of Re, while f decreases with the increase of Re. The heat transfer efficiency in the straight channel and wing channel has been improved by 53.3% and 56.9%, respectively. By fitting, a heat transfer and friction correlation equation was established for molten salt and sCO₂ as working fluids in printed circuit board heat exchangers.

Key words

numerical simulation / molten salt / sCO₂ / printed circuit board heat exchanger / airfoil channel / straight channel

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Wang Yanquan, Lu Yuanwei, Gao Qi, Li Feng, Ma Yancheng, Wu Yuting. STUDY ON THERMAL AND HYDRAULIC PERFORMANCE OF THIRD GENERATION SOLAR THERMAL POWER HEAT EXCHANGER[J]. Acta Energiae Solaris Sinica. 2024, 45(12): 190-196 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1156

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